I use netbeans 3.4.1 to debug my java programs, and I have
set several breakpoints inside. When I start to debug, it
will jump to a breakpoint, and I click "continue", then
the will be highlighted in red color, and the debugger has
no response for a long time(seems encounter deadlock).
Moreover, sometimes, it will display "break point at
line ?" and without highlight the line in green color.